From f1c41f807cb29472d0924149e39d6ec8ad90e6a2 Mon Sep 17 00:00:00 2001
From: eb <eb@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Wed, 27 Sep 2006 05:14:03 +0000
Subject: Merged changes from eb/digital-wip into trunk.
This includes:
* renaming gnuradio-examples/python/gmsk2 to gnuradio-examples/python/digital
* refactoring the digital data tx and rx test code into benchmark_tx
and benchmark_rx. These accept a -m <modulation> argument.
<modulation> can currently be selected from gmsk, dbpsk, dqpsk
* Two new AGC blocks: gr_agc2: separate attack and delay rates;
gr_feedforward_agc: FIR-ish compressor. Normalizes to peak envelope.
* Working DBPSK mod/demod (works fine)
* Working DQPSK mod/demod (works, but still needs more work)
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@3662 221aa14e-8319-0410-a670-987f0aec2ac5
---
.../python/digital/limbo/benchmark_mpsk_tx.py | 151 +++++++++++++++++++++
1 file changed, 151 insertions(+)
create mode 100755 gnuradio-examples/python/digital/limbo/benchmark_mpsk_tx.py
(limited to 'gnuradio-examples/python/digital/limbo/benchmark_mpsk_tx.py')
diff --git a/gnuradio-examples/python/digital/limbo/benchmark_mpsk_tx.py b/gnuradio-examples/python/digital/limbo/benchmark_mpsk_tx.py
new file mode 100755
index 0000000000..ec08fb6807
--- /dev/null
+++ b/gnuradio-examples/python/digital/limbo/benchmark_mpsk_tx.py
@@ -0,0 +1,151 @@
+#!/usr/bin/env python
+#
+# Copyright 2005, 2006 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2, or (at your option)
+# any later version.
+#
+# GNU Radio is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GNU Radio; see the file COPYING. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr, gru, blks
+from gnuradio import usrp
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+import random, time, struct, sys
+
+# from current dir
+from transmit_path import transmit_path
+import fusb_options
+
+#import os
+#print os.getpid()
+#raw_input('Attach and press enter')
+
+
+class my_graph(gr.flow_graph):
+
+ def __init__(self, options, mod_kwargs):
+ gr.flow_graph.__init__(self)
+ self.txpath = transmit_path(self, options, mod_kwargs)
+
+
+# /////////////////////////////////////////////////////////////////////////////
+# main
+# /////////////////////////////////////////////////////////////////////////////
+
+def main():
+
+ def send_pkt(payload='', eof=False):
+ return fg.txpath.send_pkt(payload, eof)
+
+ def rx_callback(ok, payload):
+ print "ok = %r, payload = '%s'" % (ok, payload)
+
+ parser = OptionParser (option_class=eng_option)
+ parser.add_option("-T", "--tx-subdev-spec", type="subdev", default=None,
+ help="select USRP Tx side A or B")
+ parser.add_option("-f", "--freq", type="eng_float", default=423.1e6,
+ help="set Tx and Rx frequency to FREQ [default=%default]",
+ metavar="FREQ")
+ parser.add_option("-r", "--bitrate", type="eng_float", default=None,
+ help="specify bitrate. spb and interp will be derived.")
+ parser.add_option("-S", "--spb", type="int", default=2,
+ help="set samples/baud [default=%default]")
+ parser.add_option("-i", "--interp", type="intx", default=None,
+ help="set fpga interpolation rate to INTERP [default=%default]")
+ parser.add_option("-s", "--size", type="eng_float", default=1500,
+ help="set packet size [default=%default]")
+ parser.add_option("-g", "--gain", type="eng_float", default=100.0,
+ help="transmitter gain [default=%default]")
+ parser.add_option("-M", "--megabytes", type="eng_float", default=1.0,
+ help="set megabytes to transmit [default=%default]")
+ parser.add_option("","--discontinuous", action="store_true", default=False,
+ help="enable discontinous transmission (bursts of 5 packets)")
+
+ parser.add_option("-m", "--modulation", type="string", default='dbpsk',
+ help="modulation type (bpsk, dbpsk, dqpsk) [default=%default]")
+ parser.add_option("", "--excess-bw", type="float", default=0.3,
+ help="set RRC excess bandwith factor [default=%default]")
+ parser.add_option("", "--no-gray-code", action="store_false", default=True,
+ help="Don't use gray coding on modulated bits [default=%default]")
+
+ fusb_options.add_options(parser)
+ (options, args) = parser.parse_args ()
+
+ if len(args) != 0:
+ parser.print_help()
+ sys.exit(1)
+
+ if options.freq < 1e6:
+ options.freq *= 1e6
+
+ pkt_size = int(options.size)
+
+ # Add PSK modulator class to options list
+ options.modulation = getattr(blks, options.modulation + "_mod")
+
+ # Add PSK modulator's properties
+ mod_kwargs = {
+ 'spb' : options.spb,
+ 'excess_bw' : options.excess_bw,
+ 'gray_code' : options.no_gray_code,
+ 'verbose' : False,
+ 'debug' : False,
+ }
+
+ # build the graph
+ fg = my_graph(options, mod_kwargs)
+
+ print "bitrate: %sb/sec" % (eng_notation.num_to_str(fg.txpath.bitrate()),)
+ print "spb: %3d" % (fg.txpath.spb(),)
+ print "interp: %3d" % (fg.txpath.interp(),)
+
+ ok = fg.txpath.set_freq(options.freq)
+ if not ok:
+ print "Failed to set Tx frequency to %s" % (eng_notation.num_to_str(options.freq),)
+ raise SystemExit
+
+ r = gr.enable_realtime_scheduling()
+ if r != gr.RT_OK:
+ print "Warning: failed to enable realtime scheduling"
+
+ fg.start() # start flow graph
+
+ # generate and send packets
+ nbytes = int(1e6 * options.megabytes)
+ n = 0
+ pktno = 0
+
+ while n < nbytes:
+ send_pkt(struct.pack('!H', pktno) + (pkt_size - 2) * chr(pktno & 0xff))
+ n += pkt_size
+ sys.stderr.write('.')
+ if options.discontinuous and pktno % 5 == 4:
+ time.sleep(1)
+ pktno += 1
+
+ send_pkt(eof=True)
+ fg.wait() # wait for it to finish
+ fg.txpath.set_auto_tr(False)
+
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass
--
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